Unusually Reactive Cyclic Anhydride Expands the Scope of the Castagnoli–Cushman Reaction
作者:Maria Chizhova、Olesya Khoroshilova、Dmitry Dar’in、Mikhail Krasavin
DOI:10.1021/acs.joc.8b02164
日期:2018.10.19
“azole-including” cyclic anhydrides in the Castagnoli–Cushman reaction with imines, a remarkably reactive, pyrrole-based anhydride has been identified. It displayed a remarkably efficient reaction with N-alkyl and N-aryl imines, in particular, with “enolizable” α-C-H imines which typically fail to react with a majority of known cyclic anhydrides. The reactivity of this anhydride has been justified by
在Castagnoli-Cushman与亚胺的反应中合成和测试各种“含唑”环酸酐的过程中,已发现了一种具有显着活性的吡咯型酸酐。它显示出与N-烷基和N-芳基亚胺,特别是与“可烯醇化”的α-CH亚胺的高效反应,后者通常无法与大多数已知的环状酸酐反应。该酸酐的反应性已经通过其烯醇形式的有效共振稳定来证明。这一发现扩大了现有的高反应性环状酸酐库,并进一步证实了酸酐烯化对于有效的Castagnoli-Cushman反应的重要性。